Where in upstate New York? Rochester Canoe Club comes to mind. http://www.rochestercc.org/ they have a great group of sunfish sailors.
Sorry. I didn't originally read that you were looking for sunfish sailing near Albany. I would try looking for clubs around Saratoga Lake and Lake George.
You could try getting in touch with Dan Hesse who belongs to Saratoga sailing club. I don't know if there are any other Sunfish there, but Dan is active in the class and would know the scoop. Thing is, I don't know how to get in touch with Dan.